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  1. J

    4.3 Mercruiser Crank, No Start

    It uses the existing coil wire. It’s the in-line style. The plugs and plug wires are new. I replaced them when I put the Delco EST ignition system in last month. What I find is weird is that there’s no power to the purple wire for the fuel pump but there’s power everywhere else along that wire.
  2. J

    4.3 Mercruiser Crank, No Start

    I will get one tomorrow. Do you happen to know how it is supposed to be connected?
  3. J

    4.3 Mercruiser Crank, No Start

    However, when I use a spark tester, i get a steady blue spark. I started testing some of the wires and tracing them, and I’m not getting any power on the purple wire at the plug to the fuel pump.
  4. J

    4.3 Mercruiser Crank, No Start

    So I tested the coil like you said, and my timing light does not flash at all when cranking.
  5. J

    4.3 Mercruiser Crank, No Start

    I have 12 volts on the purple wire with the key on.
  6. J

    4.3 Mercruiser Crank, No Start

    Gauge is only maxed out with key on. I inspected the harness and there’s no corrosion at the 10-pin plug, and all the female connections look good. I do own a timing light
  7. J

    4.3 Mercruiser Crank, No Start

    1A633081
  8. J

    4.3 Mercruiser Crank, No Start

    The fuel pump runs when cranking, or at least I think it does because I can hear fuel going into the carb after I stop turning the key. How do I get power to the distributor and not wired to the starter?
  9. J

    4.3 Mercruiser Crank, No Start

    TL;DR: I have replaced the starter, fuel pump, changed the oil and filter, oil pressure sensor and sending unit, ignition system (went with Delco EST from Mocassin Marine), fuel/water separator, spark plugs, and plug wires. Checked all wiring for corrosion and couldn't find anything. The neutral...
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